Plug lock



FIG. 1 is a front, top and side perspective view of the plug lock showing my new design;

FIG. 2 is a front end elevational view thereof;

FIG. 3 is a rear end elevational view thereof;

FIG. 4 is a side elevational view thereof, the side opposite being a mirror image of the side shown in FIG. 4;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a front and upper left perspective thereof. 

The ornamental design for a plug lock, as shown and described. 